Arrangement introduced into an extension for automatic weapon magazine

ABSTRACT

Extension for an automatic pistol magazine, comprising a substantially parallelepiped box of moldable material, defined by a front wall and by lateral walls, open on the upper face thereof, wherein said lateral walls are provided with inner slide channels, one on each side and made near the upper edges, whereas the rear open portion is properly closed by a secondary body sliding on external rails of the rear edge of said walls in a male-female fitting, with inner slide channels made near the front edges of the secondary body, locked by an elastic tongue, said tongue having a teeth that penetrates in a groove at the bottom of the magazine&#39;s metallic body and said front wall having an anatomical shape for a better hand grasp of the pistol, lodging the little finger on the anatomical recess thereof.

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application is a Continuation-In-Part of U.S. patentapplication Ser. No. 09/604,380 for ARRANGEMENT INTRODUCED INTO ANEXTENSION FOR AUTOMATIC WEAPON MAGAZINE, By Telmo Ricardo Wollmann,filed Jun. 27, 2000.

BACKGROUND OF THE INVENTION

[0002] The present invention relates to a new model of extensions forautomatic pistol magazines. As is known in the state of the art, thesmall-size automatic pistols are provided with means for the storage ofcartridges in the body of clip loaders or magazines, which arrange thecartridges overlapping each other, thereby configuring a part having apredominantly vertical dimension with respect to the other dimensionsand having a given number of stored cartridges.

[0003] However, in addition to the desirabilities for decreasing thenumber of handling operations for recharging cartridges in themagazines, it is extremely desirable to have magazines with the largestpossible capacity.

[0004] It is an objective of the present model to provide a complementor extension for automatic pistol magazines, in order to increase thecapacity of said magazines in a practical and quick manner, bysubstituting the lower end of said magazine with said extension.

[0005] Document MU 7600289-6 is known in the state of the art, whichshows an arrangement of extensions for magazines, comprising a metallicbox to be coupled to the lower end of said magazine. Such part is moldedas two half-bodies, so as to have a male-female type fitting at theupper end of the main half-body for adaptation to the lower end of saidmagazine to be attached, and possessing a closure by means of bolts thatattach the secondary half-body to the main half-body.

[0006] Such arrangement has the drawback of possessing a bolt-typeclosure, which upon prolonged use may suffer from the usual problems ofsuch type of connection, such as loosening or locking of such boltswithin the seat by reason of oxidizing, etc., requiring the use ofspecific tools for assembly and disassembly of such complement, therebyrequiring additional time and expense.

SUMMARY OF THE INVENTION

[0007] Accordingly, the scope of the present model of the presentinvention is to provide not only a substantially simpler arrangement forconstruction thereof, by using injected materials that do not requirelarge investments in tooling, but also to provide a complement of easyfitting and assembly, decreasing the number of operations and,therefore, decreasing the expenses thereof.

[0008] The complement in question not only allows a significant increasein the storage capacity of said cartridge magazine, making it possibleto add more cartridges to said magazine, but also allows a betterclosing of the lower portion of said magazine, replacing the originalclosure, thereby providing a better finish for said magazine, but alsoincreasing the total extension of the handle of said automatic pistols,by incorporation thereof to the total grip of the pistol, increasing thetotal grasping area of the pistol in the user's hand and allowing abetter accommodation of the fingers on the pistol handle, since saidextension is provided with a recess on the front portion thereof,facilitating the support of the user's finger on said recess.

[0009] Such scope is attained by a locking by means of proper integratedguides and a tongue integrated to said extension, rendering it morepractical and with a lower number of components and number of productionoperations, being as reliable as the attachment by means of bolts.

[0010] Another advantage arising out of such arrangement is to providean anatomical projection on the rear portion thereof, without theinterference of nuts or bolts for support of the user's hand.

[0011] Such magazine extension basically comprises a box ofsubstantially parallelepiped shape, made of easily moldable material, tobe fitted to the lower end of said automatic pistol magazines by meansof sets of guides and tongues, allowing a simple and efficient fittingand possessing on the front portion thereof an anatomical recess forfinger support.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] For a better description of said extension for automatic pistolmagazines, a detailed description thereof is made with reference to theappended drawings, of illustrative and non-limiting nature, wherein:

[0013]FIG. 1 shows a lateral view of a little pistol with a conventionalmagazine;

[0014]FIG. 2 shows a lateral view of the same pistol with a magazinewith said extension;

[0015]FIG. 3 is a perspective of said magazine inserted in saidextension and a detail of the fitting between said magazine and saidextension;

[0016]FIG. 4 is an exploded perspective view of said extension, its twocomponents and the end of magazine; and

[0017]FIG. 5 shows a posterior perspective view of said magazineinserted in the secondary body 7 of said extension.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0018] As shown in FIGS. 1 and 2, said extension 2 is fitted to thelower portion of a conventional magazine 1 and, as shown in FIG. 3, iscomprised of a main body 2 comprised of secondary bodies 7 and 12 (FIG.4) that slidingly fit to each other and said main body 2 fitting bymeans of guides 9 of secondary body 7 to said magazine 1. Such guideshave a simple, sliding inner fitting to the lateral ribs 4 projectingoutside perpendicularly to the main axis of magazine 1 (FIG. 5).

[0019] The main body 2 has a substantially parallelepiped shape, with acavity 10 housing the cartridges that said extension adds to the totalcapacity of magazine 1 and also constituting a support for the innerspring 3 and open on the upper portion thereof, having on the front wall6 thereof an anatomic recess 5 that allows a better finger support.

[0020] Said main body 2 is composed of two secondary bodies or elements7 and 12, said secondary body 7 being shaped comprised of lateral walls8 possessing slide guides 9 for fitting to the lower portion of saidmagazine 1 and possessing on the front portion thereof said front wall 6having the outer portion provided with an anatomical concave shape 5 forfitting of the user's finger and with the rear portion thereof providedwith male guides 11 which slidingly fit to the secondary body 12completing the main body 2.

[0021] The secondary body 12 is in turn comprised of a lower body havinga substantially plain face with female guides 13 for fitting of the maleguides 11 of the secondary body 7, for the formation of said main body2. Said secondary body 12 is provided with an elastic, integrated tongue14 to allow the attachment thereof to said magazine 1, said tongue 14being provided with a projection 15 that allows the locking of saidsecondary body to the magazine 1 by means of an opening or gap on thelower portion of said magazine 1, for integral attachment thereto.

[0022] For assembly of said main body 2, initially the secondary body 7is attached to the magazine 1. This done by means of its guides 9sliding through projections or guides 4 on the lower portion of saidmagazine 1. The secondary body 12 is then overlapped to the secondarybody 7 and slides down by means of its guides 13 through this guides 11of the secondary body 7 and at the end of the fitting, said tongue 14locks the assembly to the lower portion of said magazine 1, by means ofits projection 15.

[0023] For disassembly of said extension, it is necessary to make theopposite movement, pressing said tongue 14 by means of a metallic stem,for example, a screwdriver, so that the projection 15 moves out of thelower portion of said magazine 1, allowing the disassembly of the set bysliding of the secondary body 10 over the secondary body 5 and thesliding thereof out of said magazine 1.

[0024] It is to be understood that the invention is not limited to theillustrations described and shown herein, which are deemed to be merelyillustrative of the best modes of carrying out the invention, and whichare susceptible of modification of form, size, arrangement of parts anddetails of operation. The invention rather is intended to encompass allsuch modifications which are within its spirit and scope as defined bythe claims.

What is claimed is:
 1. Extension of automatic pistol magazines in orderto increase capacity, which comprises: an extension for the lowerportion of said magazine, which extension closes the magazine and alsosupports an inner spring; the extension being coupled to said magazineby an internal slide fitting with lateral ribs of said magazine; theextension having a shape of a box defined by two secondary bodies; thefirst secondary body is formed by a front wall and lateral walls, and isopen on the upper face thereof, where said lateral walls are providedwith inner slide channels, one on each side of said secondary body andadjacent the upper edge of said lateral walls; wherein a rear openportion of the first secondary body is closed by a second secondary bodysliding vertically on external rails of the rear edge of said lateralwalls in a male-female fitting with inner slide channels provided infront of said second secondary body; the second secondary body beinglocked in the closed operating position by means of an elastic tongue,said elastic tongue having at least one tooth that penetrates in saidmagazine, fitting to the lower edge of said magazine.
 2. Extensionaccording to claim 1, wherein the front wall of the first secondary bodyhas an anatomical concavity with a recess therein for support of thefinger of an individual.
 3. Extension according to claim 1, wherein saidat least one tooth penetrate a groove in the bottom of said magazine. 4.Extension according to claim 1, wherein said at least one toothpenetrates in a lower gap of said magazine.